Table 2.

Oxygen saturation measured by pulse oximetry and ABGs and in different locations among different groups of HF patients.

	Control	Group A	Group B	Group C	p
		(EF>40%)	(EF<40%)	(Acute HF)
O2 sat in ABGs	96.6±3.14	94.8±5.1	93.32±3.63	92.84±7.45	0.056
O2 sat in finger	96.2±4.2	93.2±5.4	88.43±8.2	90±6.3	0.029*
O2 sat in toe	95.7±4,7	92.9± 2.8	89.3±6.1	89.3±10.6	0.049*
O2 sat in ear	96.9±2.8	91.89±3.5	92.78±8.7	93.6±6.2	0.051
p	0.09	0.054	0.005*	0.008*

ABGs, arterial blood gases; HF, heart failure; EF, ejection fraction; O₂ sat, oxygen saturation.